body {
  font: 14px "Lucida Grande", Helvetica, Arial, sans-serif;
}

* {
  padding: 0;
  margin: 0;
}

h1 {
  position: absolute;
  top: 3%;
  left: 50%;
  transform:translate(-50%,0);
}

input[type='button'] {
  display: block;
  position: absolute;
  top: 7%;
  right: 7%;
  width: 100px;
  height: 30px;
  text-align: center;
}

.box {
  width: 90%;
  height: 46%;
  text-align: center;
  position: absolute;
  top: 12%;
  left: 50%;
  transform:translate(-50%,0);
  overflow: hidden;
}

.box table {
  width: 1728px;
}

.box table tr:nth-child(even) {
  background: #b6bfeb;
}

.box table tr th,
.box table tr td {
  height: 35px;
  text-align: center;
}

.box table tr td {
  position: relative;
}

#table1_tableLayout table tr td:nth-child(3) {
  width: 153px;
}

.div1::before {
  content: "√";
  margin: 0 auto;
  line-height: 36px;
  font-size: 25px;
  color: rgb(240, 240, 240);
  text-shadow: rgb(191, 191, 191) 0 -1px 0;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 40%;
  right: 0;
  margin-left: -50%;
  cursor: pointer;
}
.div2::before {
  content: "X";
  margin: 0 auto;
  line-height: 36px;
  font-size: 20px;
  color: rgb(240, 240, 240);
  text-shadow: rgb(191, 191, 191) 0 -1px 0;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 40%;
  right: 0;
  margin-left: -50%;
  cursor: pointer;
}

.div3::before {
  content: "◯";
  margin: 0 auto;
  line-height: 36px;
  font-size: 20px;
  color: rgb(240, 240, 240);
  text-shadow: rgb(191, 191, 191) 0 -1px 0;
  position: absolute;
  top: -2px;
  bottom: 0;
  left: 40%;
  right: 0;
  margin-left: -50%;
  cursor: pointer;
}
.divCol1::before{
  content: "√";
  margin: 0 auto;
  line-height: 36px;
  font-size: 25px;
  color: green;
  text-shadow: rgb(191, 191, 191) 0 -1px 0;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 40%;
  right: 0;
  margin-left: -50%;
  cursor: pointer;
}
.divCol2:before{
  content: "X";
  margin: 0 auto;
  line-height: 36px;
  font-size: 20px;
  color: red;
  text-shadow: rgb(191, 191, 191) 0 -1px 0;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 40%;
  right: 0;
  margin-left: -50%;
  cursor: pointer;
}
.divCol3::before{
  content: "◉";
  margin: 0 auto;
  line-height: 36px;
  font-size: 25px;
  color: blue;
  text-shadow: rgb(191, 191, 191) 0 -1px 0;
  position: absolute;
  top: -2px;
  bottom: 0;
  left: 40%;
  right: 0;
  margin-left: -50%;
  cursor: pointer;
}

#myInput {
  background-image: url('https://static.runoob.com/images/mix/searchicon.png'); /* 搜索按钮 */
  background-position: 10px 4px; /* 定位搜索按钮 */
  background-repeat: no-repeat; /* 不重复图片 */
  width: 12%;
  font-size: 16px;
  padding: 5px 0 5px 40px;
  border: 1px solid #ddd;
  margin-bottom: 12px;
  position: absolute;
  left: 5%;
  top: 7%;
}

/*清除谷歌浏览器下的 search 叉号*/
input::-webkit-search-cancel-button{
  display: none;
}
/*清除IE下的 search 叉号*/
input[type=search]::-ms-clear{
  display: none;
}

/*右击选项卡功能*/
#menutab {
  -webkit-border-radius: 5px;
  -moz-border-radius: 5px;
  border-radius: 5px;
  background: white;
  position: absolute;
  width: 150px;
  visibility: hidden;
  border: 1px solid #666;
  z-index: 99;
}

#menutab ul {
  padding: 0;
  margin: 0;
}

#menutab li {
  list-style: none;
  text-indent: 1em;
}

#menutab li a {
  display: block;
  height: 30px;
  line-height: 30px;
  border-bottom: 1px solid #666;
  text-decoration: none;
  color: #666;
  font: 12px/30px tahoma;
}

#menutab li a:hover {
  background: #eee;
  color: black;
}